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P. W. SCOTT. HOISTING ENGINE.

Patented Mar. 17, 1896.

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(No Model.) 3 SheetsSheet 2. P. W. SCOTT. HOISTING ENGINE.

No. 556,699. Patented Mar. 17, 1896.

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. 3 Sheets-Sheet 3 P. W. SCOTT.

- HOISTING ENGINE. No. 556,699.

Patented Mar. 17, 1896.

UNITED STATES PATENT Orrics.

FREDERTC XV. SCOTT, OF CAMBRIDGE, MASSACHUSETTS, ASSIGNOR TO JOHN G.MORRISON, OF SAME PLACE.

HOlSTlNG -ENGINE.

SPECIFICATION forming part of Letters Patent No. 556,699, dated March17, 1896. Application filed July 22, 1895. Serial No. 566,738. onmodel.)

To aZZ whom it may concern: the gear at the other end and an oppositeturn Be it known that I, FREDERIG W. Sco'r'r, a disengaging it.

citizen of the Dominion of Canada, residing So far the apparatus is thatshown in the at Ca1nbridge,in the county of Middlesex and said patent,except in the pivoting of the le- State of Massachusetts, have inventednew 'ver, now to be explained. In that patent 5 5 and usefulImprovements in lloisting- Enthere is an arm one of whose ends isfashioned gines, of which the following, taken in 0011- into a collarfitting upon a nut correspondnection with the accompanying drawings, ising to the nut 12 and arranged to be clamped a specification. thereon,the other end of the arm being fash- My invention consists inimprovements ioned into a handle, to be grasped by the op- 60 upon theinvention of George V. Rawson and orator in engaging and disengaging thefrie- Gcorge E. W'orthen in hoisting apparatus, tion. This device,however, has been found patented March 16, 1886, No. 337,806. open tovarious objectionsaniong them that In the drawings, Figure 1 is a sideelevathe handle would not stay where put, owing I5 tion of the apparatusfrom the lever side. to the drag of the collar on the nut, and that 6 5Fig. 2 is a horizontal section of the same on if the position of thehandle was right for one the line a w of Fig. 1, including only thelever operator it was wrong for another and could side of the apparatus.Fig. 3 is a like secnot readily be adjusted, because the nut was tion,including only the friction end of the inaccessible to be held duringthcadjustment.

2o drum. F ig. 4: is an elevation of the friction To remove theseobjections I have invented 70 end of the drum. the followingcontrivance: A roclcshaft The working parts of the machine are supisjournaled in the bearing 1. To its outer ported by a frame 1, which isshown only at end the long arm 20, terminating in a handle, the leverend, since the friction end is the (notshown,)is adjustably clamped.Uponits 2 5 same as in the patent above referred to, carinner end iscast a short arm 18, into which is 7 5 rying the other bearing of themain drivinginserted a pin 21, on which is journaled a shaft with itspinion and the gear on the flanged steel roller22. Upon thenut 14 isfitdrunrshaft with its internal conical frictionted an adjustable collar23, from which prosurfa-ce, these elements being precisely the jects aradially-slotted piece 21 embracing the same as in. the said patent.roller 22 and so proportioned that the roller 80 The frame as shown inFig. 1 carries three when in line between shaft 0 and shaft 19 isbearings that of the drumshaft 2, that of just at the inner end of theslot, as clearly the main driving-shaft 3, and that of the lever shownin Fig. 2, and so proportioned also that 1. Upon the main driving-shaft5 is mountwhen the roller is at the outer end of the slot 3 5 ed theordinary balance-wheel 6 with crankthe arm 18 and piece 2% will be atabout right 8 5 pin 7, to be connected with any desired source angles.of motion. The drum 8 is mounted loosely It will be seen that theposition shown in upon the main driving-shaft 9, its bearings the figureis the middle position of the rockbeing at 10, Fig. 2, and 11, Fig. 3.There is shaft 19 and arm 20, for they may be swung a hub 12 surroundingthe drum-shaft 9 and over from left to right, carrying the piece 24 9oscrewed to the frame by the screws 13, whose up, or over from right toleft, carrying the outer surface is provided with a high-pitched piece21 down, and at either extremity of the thread, upon which is fitted thenut lat. The stroke the arm 20 will stay put, because at nut has agrooved projection 15 engaged by those points the pressure of the piece24 is a collar 16 attached to the drum by screws 17. endwise upon thearm 18. 9 a

By this arrangement the drum may rotate It will also be seen that thegreatest leverindependently, but longitudinally must folage is obtainedat the point where the friction low the nut, a turn of the latter in onediis engaged and at the point of beginning the rcction moving the druminto engagement movement of the drum toward the clutch,

with the internal conical friction-surface of just where it is mostneeded.

3 and 4 is attached a friction-surface 27 of wood or the like, shaped tofit the internal conical surface of the gear, as fully shown in theabove-mentioned patent; but I have invented a new way of attaching andadjusting the same. Heretofore the wood has been affixed to the flangeof the drum by bolts secured by keys.

My invention consists first in mounting the wood 27011 a separate disk28, with a conical flange 29 thereon and with a circular. recess 30,into which fits accurately an annular ridge 31. on the flange 32 of thedrum 8. The disk 28 and the flange 32 are secured together by boltsthrough corresponding cars 34 35 in them. Then the surface of the woodhas become much worn, the disk 28 may be readily detached andsent to theshop for anew wood cone without disturbing the drum'and its connections,and when returned. and replaced is automatically centered by the fit ofthe ridge 31 in therecess 30. The bolts 36 that secure the wood to thedisk fit into conical'nuts 37, which rest in conical holes in the wood,and the bolt-heads project into holes bored through the flange 32 andlie flush with the inner surface of the latter, beingturned up by asquareended wrench or bar inserted in square recesses 38. The wood maybe arranged in any suitable sections, being preferably in thin layersparallel with the disk 28, quartered and staggered.

If, now, the wood works loose at any point in its circumference, it maybe immediately turned up snug without more ado than stopping the drum amoment.

hat I claim as new and of my invention 1s- 1. The combination of the arm20, the rockshaft 19, the arm 18, the pin 21, the roller22, and theslotted piece 24: engaged by said pin and roller and actuating thefriction-clntch mechanism, substantially as described.

2. Thecombination of the wearing-surface 27, the bolts 36, the conical.nuts 37, the disk 28, and the drum 8 and drumefiange 32,.substantiallyas described.

3; The combination of the separate disk 28 with. its conical flange, andthe wooden friction-ring 27 secured to it ready for attachment to thedrum-flange 32, substantially as described.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, onthis 20th day of July, A. D.1895.

FREDERIC XV. SCOTT.

Witn esses:

ERNEST O, GOODALE, LEPINE HALL RICE.

